Auxiliary Views - The Envelope Please



In this activity the students will each receive an envelope that will contain an isometric drawing that includes an inclined surface. They will be required to complete the necessary views including the auxiliary view. All measurements are to be in inch decimals to 2 places.

THE ENVELOPE PLEASE is a method to distribute the problem assignment in an unique way to encourage individual involvement in the learning process.

If you have 32 engineering students in the class you would need, perhaps 8 different drawing problems , that is, 4 copies each of 8 different drawings. You can use as many problems as want however. In addition to numbering the envelope from 1 to 32 I use a different colored pencil or marker to indicate to myself that this particular envelope has a particular problem.

I make big deal before distributing the envelopes. I shuffle the envelope, mix them up, and even give them to a student to mix up numbered envelopes.

I then walk around to each station , fan out the envelopes, and have each student select an envelope. Since the students are sitting rather close together at the CAD workstation I glance at the envelope to make sure they do not have the same colored envelope, that is, they selected the same colored envelope. If they do I kidding tell them that the problem in the envelope is very hard and suggest they take a different envelope. Or just ask them to exchange for a different problem.

As a reminder all dimensions are to be in 2 place inch decimals..

I further announce to the students to be ready for a potential dimension change within the first eight minutes. Then those students that happened to select an elementary problem I raise the challenge by changing one dimension. That dimension change is recorded directly on drawing problem. Both the completed drawing and the problem are due at the end of the block schedule. The students actually have approximately 1/2 the time as do the participants in the finals at SkillsUSA California.

THE ENVELOPE PLEASE is but one way to enhance the teaching of engineering drawing and design.

Lesson Time

2 class periods each at 55
0 Minutes
0 Minutes

Industries / Subjects / Grades

Industries / Pathways
  • Engineering & Architecture Engineering & Architecture

Standards and Objectives


California Academic Content Standards (3)
California's 2008 CTE Standards (9)

Related Instructional Objectives (SWBAT...)

  • - Work independently with written instructions to complete a drawing project
  • - Apply previous knowledge to a new situation in an industrial way.
  • - Convert an isometric drawing to a multi-view working drawing-
  • - Apply drawing solution utilizing an auxiliary view.

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